如何将列表中的元素合并在一起? [英] How do i merge elements in a list together?

问题描述

我有这个句子列表，我想将它们合并在一起以创建一个完整的列表.

I have this list of sentences and I want to merge them together to create one whole list.

test = [['Hello my name is Py. How are you today?'],['The world is a great place. Another sentence.']]

如何合并元素以创建它?

How do I merge the elements to create this?

test = ['Hello my name is Py. How are you today? The world is a great place. Another sentence.']

或

test = 'Hello my name is Py. How are you today? The world is a great place. Another sentence.'

谢谢

推荐答案

您可以使用

You can use itertools.chain to chain the element from each sublist, calling str.join on the chain object to create a single string.

test = [['Hello my name is Py. How are you today?'],['The world is a great place. Another sentence.']]

from itertools import chain

print(" ".join(chain.from_iterable(test)))
Hello my name is Py. How are you today? The world is a great place. Another sentence

或者仅使用联接:

print(" ".join(["".join(sub) for sub in test]))
Hello my name is Py. How are you today? The world is a great place. Another sentence.

如果每个子列表中只有一个字符串，则只需索引:

If you only have a single sting in each sublist just index:

print(" ".join([sub[0] for sub in test]))

Hello my name is Py. How are you today? The world is a great place. Another sentence.

要获取列表，只需将联接包装在列表中即可:

To get a list just wrap the join in a list:

print([" ".join([sub[0] for sub in test])])
['Hello my name is Py. How are you today? The world is a great place. Another sentence.']

如果每个子列表中都有很多子字符串，那么链将是最有效的解决方案.

If you have a lot of substrings in each sublist then chain will be the most efficient solution.

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